FreeBSD/Linux Kernel Cross Reference
sys/netinet6/in6_var.h

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the project nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      $KAME: in6_var.h,v 1.56 2001/03/29 05:34:31 itojun Exp $
     */
    
    /*-
     * Copyright (c) 1985, 1986, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)in_var.h    8.1 (Berkeley) 6/10/93
     * $FreeBSD: releng/12.0/sys/netinet6/in6_var.h 337866 2018-08-15 20:23:08Z mmacy $
     */
    
    #ifndef _NETINET6_IN6_VAR_H_
    #define _NETINET6_IN6_VAR_H_
    
    #include <sys/tree.h>
    #include <sys/counter.h>
    
    #ifdef _KERNEL
    #include <sys/fnv_hash.h>
    #include <sys/libkern.h>
    #endif
    
    /*
     * Interface address, Internet version.  One of these structures
     * is allocated for each interface with an Internet address.
     * The ifaddr structure contains the protocol-independent part
     * of the structure and is assumed to be first.
     */
    
    /*
     * pltime/vltime are just for future reference (required to implements 2
     * hour rule for hosts).  they should never be modified by nd6_timeout or
     * anywhere else.
     *      userland -> kernel: accept pltime/vltime
     *      kernel -> userland: throw up everything
     *      in kernel: modify preferred/expire only
     */
    struct in6_addrlifetime {
            time_t ia6t_expire;     /* valid lifetime expiration time */
            time_t ia6t_preferred;  /* preferred lifetime expiration time */
            u_int32_t ia6t_vltime;  /* valid lifetime */
            u_int32_t ia6t_pltime;  /* prefix lifetime */
    };
    
    struct nd_ifinfo;
   struct scope6_id;
   struct lltable;
   struct mld_ifsoftc;
   struct in6_multi;
   
   struct in6_ifextra {
           counter_u64_t *in6_ifstat;
           counter_u64_t *icmp6_ifstat;
           struct nd_ifinfo *nd_ifinfo;
           struct scope6_id *scope6_id;
           struct lltable *lltable;
           struct mld_ifsoftc *mld_ifinfo;
   };
   
   #define LLTABLE6(ifp)   (((struct in6_ifextra *)(ifp)->if_afdata[AF_INET6])->lltable)
   
   #ifdef _KERNEL
   
   SLIST_HEAD(in6_multi_head, in6_multi);
   MALLOC_DECLARE(M_IP6MADDR);
   
   struct  in6_ifaddr {
           struct  ifaddr ia_ifa;          /* protocol-independent info */
   #define ia_ifp          ia_ifa.ifa_ifp
   #define ia_flags        ia_ifa.ifa_flags
           struct  sockaddr_in6 ia_addr;   /* interface address */
           struct  sockaddr_in6 ia_net;    /* network number of interface */
           struct  sockaddr_in6 ia_dstaddr; /* space for destination addr */
           struct  sockaddr_in6 ia_prefixmask; /* prefix mask */
           u_int32_t ia_plen;              /* prefix length */
           CK_STAILQ_ENTRY(in6_ifaddr)     ia_link;        /* list of IPv6 addresses */
           int     ia6_flags;
   
           struct in6_addrlifetime ia6_lifetime;
           time_t  ia6_createtime; /* the creation time of this address, which is
                                    * currently used for temporary addresses only.
                                    */
           time_t  ia6_updatetime;
   
           /* back pointer to the ND prefix (for autoconfigured addresses only) */
           struct nd_prefix *ia6_ndpr;
   
           /* multicast addresses joined from the kernel */
           LIST_HEAD(, in6_multi_mship) ia6_memberships;
           /* entry in bucket of inet6 addresses */
           CK_LIST_ENTRY(in6_ifaddr) ia6_hash;
   };
   
   /* List of in6_ifaddr's. */
   CK_STAILQ_HEAD(in6_ifaddrhead, in6_ifaddr);
   CK_LIST_HEAD(in6_ifaddrlisthead, in6_ifaddr);
   #endif  /* _KERNEL */
   
   /* control structure to manage address selection policy */
   struct in6_addrpolicy {
           struct sockaddr_in6 addr; /* prefix address */
           struct sockaddr_in6 addrmask; /* prefix mask */
           int preced;             /* precedence */
           int label;              /* matching label */
           u_quad_t use;           /* statistics */
   };
   
   /*
    * IPv6 interface statistics, as defined in RFC2465 Ipv6IfStatsEntry (p12).
    */
   struct in6_ifstat {
           uint64_t ifs6_in_receive;       /* # of total input datagram */
           uint64_t ifs6_in_hdrerr;        /* # of datagrams with invalid hdr */
           uint64_t ifs6_in_toobig;        /* # of datagrams exceeded MTU */
           uint64_t ifs6_in_noroute;       /* # of datagrams with no route */
           uint64_t ifs6_in_addrerr;       /* # of datagrams with invalid dst */
           uint64_t ifs6_in_protounknown;  /* # of datagrams with unknown proto */
                                           /* NOTE: increment on final dst if */
           uint64_t ifs6_in_truncated;     /* # of truncated datagrams */
           uint64_t ifs6_in_discard;       /* # of discarded datagrams */
                                           /* NOTE: fragment timeout is not here */
           uint64_t ifs6_in_deliver;       /* # of datagrams delivered to ULP */
                                           /* NOTE: increment on final dst if */
           uint64_t ifs6_out_forward;      /* # of datagrams forwarded */
                                           /* NOTE: increment on outgoing if */
           uint64_t ifs6_out_request;      /* # of outgoing datagrams from ULP */
                                           /* NOTE: does not include forwrads */
           uint64_t ifs6_out_discard;      /* # of discarded datagrams */
           uint64_t ifs6_out_fragok;       /* # of datagrams fragmented */
           uint64_t ifs6_out_fragfail;     /* # of datagrams failed on fragment */
           uint64_t ifs6_out_fragcreat;    /* # of fragment datagrams */
                                           /* NOTE: this is # after fragment */
           uint64_t ifs6_reass_reqd;       /* # of incoming fragmented packets */
                                           /* NOTE: increment on final dst if */
           uint64_t ifs6_reass_ok;         /* # of reassembled packets */
                                           /* NOTE: this is # after reass */
                                           /* NOTE: increment on final dst if */
           uint64_t ifs6_reass_fail;       /* # of reass failures */
                                           /* NOTE: may not be packet count */
                                           /* NOTE: increment on final dst if */
           uint64_t ifs6_in_mcast;         /* # of inbound multicast datagrams */
           uint64_t ifs6_out_mcast;        /* # of outbound multicast datagrams */
   };
   
   /*
    * ICMPv6 interface statistics, as defined in RFC2466 Ipv6IfIcmpEntry.
    * XXX: I'm not sure if this file is the right place for this structure...
    */
   struct icmp6_ifstat {
           /*
            * Input statistics
            */
           /* ipv6IfIcmpInMsgs, total # of input messages */
           uint64_t ifs6_in_msg;
           /* ipv6IfIcmpInErrors, # of input error messages */
           uint64_t ifs6_in_error;
           /* ipv6IfIcmpInDestUnreachs, # of input dest unreach errors */
           uint64_t ifs6_in_dstunreach;
           /* ipv6IfIcmpInAdminProhibs, # of input administratively prohibited errs */
           uint64_t ifs6_in_adminprohib;
           /* ipv6IfIcmpInTimeExcds, # of input time exceeded errors */
           uint64_t ifs6_in_timeexceed;
           /* ipv6IfIcmpInParmProblems, # of input parameter problem errors */
           uint64_t ifs6_in_paramprob;
           /* ipv6IfIcmpInPktTooBigs, # of input packet too big errors */
           uint64_t ifs6_in_pkttoobig;
           /* ipv6IfIcmpInEchos, # of input echo requests */
           uint64_t ifs6_in_echo;
           /* ipv6IfIcmpInEchoReplies, # of input echo replies */
           uint64_t ifs6_in_echoreply;
           /* ipv6IfIcmpInRouterSolicits, # of input router solicitations */
           uint64_t ifs6_in_routersolicit;
           /* ipv6IfIcmpInRouterAdvertisements, # of input router advertisements */
           uint64_t ifs6_in_routeradvert;
           /* ipv6IfIcmpInNeighborSolicits, # of input neighbor solicitations */
           uint64_t ifs6_in_neighborsolicit;
           /* ipv6IfIcmpInNeighborAdvertisements, # of input neighbor advertisements */
           uint64_t ifs6_in_neighboradvert;
           /* ipv6IfIcmpInRedirects, # of input redirects */
           uint64_t ifs6_in_redirect;
           /* ipv6IfIcmpInGroupMembQueries, # of input MLD queries */
           uint64_t ifs6_in_mldquery;
           /* ipv6IfIcmpInGroupMembResponses, # of input MLD reports */
           uint64_t ifs6_in_mldreport;
           /* ipv6IfIcmpInGroupMembReductions, # of input MLD done */
           uint64_t ifs6_in_mlddone;
   
           /*
            * Output statistics. We should solve unresolved routing problem...
            */
           /* ipv6IfIcmpOutMsgs, total # of output messages */
           uint64_t ifs6_out_msg;
           /* ipv6IfIcmpOutErrors, # of output error messages */
           uint64_t ifs6_out_error;
           /* ipv6IfIcmpOutDestUnreachs, # of output dest unreach errors */
           uint64_t ifs6_out_dstunreach;
           /* ipv6IfIcmpOutAdminProhibs, # of output administratively prohibited errs */
           uint64_t ifs6_out_adminprohib;
           /* ipv6IfIcmpOutTimeExcds, # of output time exceeded errors */
           uint64_t ifs6_out_timeexceed;
           /* ipv6IfIcmpOutParmProblems, # of output parameter problem errors */
           uint64_t ifs6_out_paramprob;
           /* ipv6IfIcmpOutPktTooBigs, # of output packet too big errors */
           uint64_t ifs6_out_pkttoobig;
           /* ipv6IfIcmpOutEchos, # of output echo requests */
           uint64_t ifs6_out_echo;
           /* ipv6IfIcmpOutEchoReplies, # of output echo replies */
           uint64_t ifs6_out_echoreply;
           /* ipv6IfIcmpOutRouterSolicits, # of output router solicitations */
           uint64_t ifs6_out_routersolicit;
           /* ipv6IfIcmpOutRouterAdvertisements, # of output router advertisements */
           uint64_t ifs6_out_routeradvert;
           /* ipv6IfIcmpOutNeighborSolicits, # of output neighbor solicitations */
           uint64_t ifs6_out_neighborsolicit;
           /* ipv6IfIcmpOutNeighborAdvertisements, # of output neighbor advertisements */
           uint64_t ifs6_out_neighboradvert;
           /* ipv6IfIcmpOutRedirects, # of output redirects */
           uint64_t ifs6_out_redirect;
           /* ipv6IfIcmpOutGroupMembQueries, # of output MLD queries */
           uint64_t ifs6_out_mldquery;
           /* ipv6IfIcmpOutGroupMembResponses, # of output MLD reports */
           uint64_t ifs6_out_mldreport;
           /* ipv6IfIcmpOutGroupMembReductions, # of output MLD done */
           uint64_t ifs6_out_mlddone;
   };
   
   struct  in6_ifreq {
           char    ifr_name[IFNAMSIZ];
           union {
                   struct  sockaddr_in6 ifru_addr;
                   struct  sockaddr_in6 ifru_dstaddr;
                   int     ifru_flags;
                   int     ifru_flags6;
                   int     ifru_metric;
                   caddr_t ifru_data;
                   struct in6_addrlifetime ifru_lifetime;
                   struct in6_ifstat ifru_stat;
                   struct icmp6_ifstat ifru_icmp6stat;
                   u_int32_t ifru_scope_id[16];
           } ifr_ifru;
   };
   
   struct  in6_aliasreq {
           char    ifra_name[IFNAMSIZ];
           struct  sockaddr_in6 ifra_addr;
           struct  sockaddr_in6 ifra_dstaddr;
           struct  sockaddr_in6 ifra_prefixmask;
           int     ifra_flags;
           struct in6_addrlifetime ifra_lifetime;
           int     ifra_vhid;
   };
   
   /* pre-10.x compat */
   struct  oin6_aliasreq {
           char    ifra_name[IFNAMSIZ];
           struct  sockaddr_in6 ifra_addr;
           struct  sockaddr_in6 ifra_dstaddr;
           struct  sockaddr_in6 ifra_prefixmask;
           int     ifra_flags;
           struct in6_addrlifetime ifra_lifetime;
   };
   
   /* prefix type macro */
   #define IN6_PREFIX_ND   1
   #define IN6_PREFIX_RR   2
   
   /*
    * prefix related flags passed between kernel(NDP related part) and
    * user land command(ifconfig) and daemon(rtadvd).
    */
   struct in6_prflags {
           struct prf_ra {
                   u_char onlink : 1;
                   u_char autonomous : 1;
                   u_char reserved : 6;
           } prf_ra;
           u_char prf_reserved1;
           u_short prf_reserved2;
           /* want to put this on 4byte offset */
           struct prf_rr {
                   u_char decrvalid : 1;
                   u_char decrprefd : 1;
                   u_char reserved : 6;
           } prf_rr;
           u_char prf_reserved3;
           u_short prf_reserved4;
   };
   
   struct  in6_prefixreq {
           char    ipr_name[IFNAMSIZ];
           u_char  ipr_origin;
           u_char  ipr_plen;
           u_int32_t ipr_vltime;
           u_int32_t ipr_pltime;
           struct in6_prflags ipr_flags;
           struct  sockaddr_in6 ipr_prefix;
   };
   
   #define PR_ORIG_RA      0
   #define PR_ORIG_RR      1
   #define PR_ORIG_STATIC  2
   #define PR_ORIG_KERNEL  3
   
   #define ipr_raf_onlink          ipr_flags.prf_ra.onlink
   #define ipr_raf_auto            ipr_flags.prf_ra.autonomous
   
   #define ipr_statef_onlink       ipr_flags.prf_state.onlink
   
   #define ipr_rrf_decrvalid       ipr_flags.prf_rr.decrvalid
   #define ipr_rrf_decrprefd       ipr_flags.prf_rr.decrprefd
   
   struct  in6_rrenumreq {
           char    irr_name[IFNAMSIZ];
           u_char  irr_origin;
           u_char  irr_m_len;      /* match len for matchprefix */
           u_char  irr_m_minlen;   /* minlen for matching prefix */
           u_char  irr_m_maxlen;   /* maxlen for matching prefix */
           u_char  irr_u_uselen;   /* uselen for adding prefix */
           u_char  irr_u_keeplen;  /* keeplen from matching prefix */
           struct irr_raflagmask {
                   u_char onlink : 1;
                   u_char autonomous : 1;
                   u_char reserved : 6;
           } irr_raflagmask;
           u_int32_t irr_vltime;
           u_int32_t irr_pltime;
           struct in6_prflags irr_flags;
           struct  sockaddr_in6 irr_matchprefix;
           struct  sockaddr_in6 irr_useprefix;
   };
   
   #define irr_raf_mask_onlink     irr_raflagmask.onlink
   #define irr_raf_mask_auto       irr_raflagmask.autonomous
   #define irr_raf_mask_reserved   irr_raflagmask.reserved
   
   #define irr_raf_onlink          irr_flags.prf_ra.onlink
   #define irr_raf_auto            irr_flags.prf_ra.autonomous
   
   #define irr_statef_onlink       irr_flags.prf_state.onlink
   
   #define irr_rrf                 irr_flags.prf_rr
   #define irr_rrf_decrvalid       irr_flags.prf_rr.decrvalid
   #define irr_rrf_decrprefd       irr_flags.prf_rr.decrprefd
   
   /*
    * Given a pointer to an in6_ifaddr (ifaddr),
    * return a pointer to the addr as a sockaddr_in6
    */
   #define IA6_IN6(ia)     (&((ia)->ia_addr.sin6_addr))
   #define IA6_DSTIN6(ia)  (&((ia)->ia_dstaddr.sin6_addr))
   #define IA6_MASKIN6(ia) (&((ia)->ia_prefixmask.sin6_addr))
   #define IA6_SIN6(ia)    (&((ia)->ia_addr))
   #define IA6_DSTSIN6(ia) (&((ia)->ia_dstaddr))
   #define IFA_IN6(x)      (&((struct sockaddr_in6 *)((x)->ifa_addr))->sin6_addr)
   #define IFA_DSTIN6(x)   (&((struct sockaddr_in6 *)((x)->ifa_dstaddr))->sin6_addr)
   
   #define IFPR_IN6(x)     (&((struct sockaddr_in6 *)((x)->ifpr_prefix))->sin6_addr)
   
   #ifdef _KERNEL
   #define IN6_ARE_MASKED_ADDR_EQUAL(d, a, m)      (       \
           (((d)->s6_addr32[0] ^ (a)->s6_addr32[0]) & (m)->s6_addr32[0]) == 0 && \
           (((d)->s6_addr32[1] ^ (a)->s6_addr32[1]) & (m)->s6_addr32[1]) == 0 && \
           (((d)->s6_addr32[2] ^ (a)->s6_addr32[2]) & (m)->s6_addr32[2]) == 0 && \
           (((d)->s6_addr32[3] ^ (a)->s6_addr32[3]) & (m)->s6_addr32[3]) == 0 )
   #define IN6_MASK_ADDR(a, m)     do { \
           (a)->s6_addr32[0] &= (m)->s6_addr32[0]; \
           (a)->s6_addr32[1] &= (m)->s6_addr32[1]; \
           (a)->s6_addr32[2] &= (m)->s6_addr32[2]; \
           (a)->s6_addr32[3] &= (m)->s6_addr32[3]; \
   } while (0)
   #endif
   
   #define SIOCSIFADDR_IN6          _IOW('i', 12, struct in6_ifreq)
   #define SIOCGIFADDR_IN6         _IOWR('i', 33, struct in6_ifreq)
   
   #ifdef _KERNEL
   /*
    * SIOCSxxx ioctls should be unused (see comments in in6.c), but
    * we do not shift numbers for binary compatibility.
    */
   #define SIOCSIFDSTADDR_IN6       _IOW('i', 14, struct in6_ifreq)
   #define SIOCSIFNETMASK_IN6       _IOW('i', 22, struct in6_ifreq)
   #endif
   
   #define SIOCGIFDSTADDR_IN6      _IOWR('i', 34, struct in6_ifreq)
   #define SIOCGIFNETMASK_IN6      _IOWR('i', 37, struct in6_ifreq)
   
   #define SIOCDIFADDR_IN6          _IOW('i', 25, struct in6_ifreq)
   #define OSIOCAIFADDR_IN6         _IOW('i', 26, struct oin6_aliasreq)
   #define SIOCAIFADDR_IN6          _IOW('i', 27, struct in6_aliasreq)
   
   #define SIOCSIFPHYADDR_IN6       _IOW('i', 70, struct in6_aliasreq)
   #define SIOCGIFPSRCADDR_IN6     _IOWR('i', 71, struct in6_ifreq)
   #define SIOCGIFPDSTADDR_IN6     _IOWR('i', 72, struct in6_ifreq)
   
   #define SIOCGIFAFLAG_IN6        _IOWR('i', 73, struct in6_ifreq)
   
   #ifdef _KERNEL
   #define OSIOCGIFINFO_IN6        _IOWR('i', 76, struct in6_ondireq)
   #endif
   #define SIOCGIFINFO_IN6         _IOWR('i', 108, struct in6_ndireq)
   #define SIOCSIFINFO_IN6         _IOWR('i', 109, struct in6_ndireq)
   #define SIOCSNDFLUSH_IN6        _IOWR('i', 77, struct in6_ifreq)
   #define SIOCGNBRINFO_IN6        _IOWR('i', 78, struct in6_nbrinfo)
   #define SIOCSPFXFLUSH_IN6       _IOWR('i', 79, struct in6_ifreq)
   #define SIOCSRTRFLUSH_IN6       _IOWR('i', 80, struct in6_ifreq)
   
   #define SIOCGIFALIFETIME_IN6    _IOWR('i', 81, struct in6_ifreq)
   #define SIOCGIFSTAT_IN6         _IOWR('i', 83, struct in6_ifreq)
   #define SIOCGIFSTAT_ICMP6       _IOWR('i', 84, struct in6_ifreq)
   
   #define SIOCSDEFIFACE_IN6       _IOWR('i', 85, struct in6_ndifreq)
   #define SIOCGDEFIFACE_IN6       _IOWR('i', 86, struct in6_ndifreq)
   
   #define SIOCSIFINFO_FLAGS       _IOWR('i', 87, struct in6_ndireq) /* XXX */
   
   #define SIOCSSCOPE6             _IOW('i', 88, struct in6_ifreq)
   #define SIOCGSCOPE6             _IOWR('i', 89, struct in6_ifreq)
   #define SIOCGSCOPE6DEF          _IOWR('i', 90, struct in6_ifreq)
   
   #define SIOCSIFPREFIX_IN6       _IOW('i', 100, struct in6_prefixreq) /* set */
   #define SIOCGIFPREFIX_IN6       _IOWR('i', 101, struct in6_prefixreq) /* get */
   #define SIOCDIFPREFIX_IN6       _IOW('i', 102, struct in6_prefixreq) /* del */
   #define SIOCAIFPREFIX_IN6       _IOW('i', 103, struct in6_rrenumreq) /* add */
   #define SIOCCIFPREFIX_IN6       _IOW('i', 104, \
                                        struct in6_rrenumreq) /* change */
   #define SIOCSGIFPREFIX_IN6      _IOW('i', 105, \
                                        struct in6_rrenumreq) /* set global */
   
   #define SIOCGETSGCNT_IN6        _IOWR('u', 106, \
                                         struct sioc_sg_req6) /* get s,g pkt cnt */
   #define SIOCGETMIFCNT_IN6       _IOWR('u', 107, \
                                         struct sioc_mif_req6) /* get pkt cnt per if */
   
   #define SIOCAADDRCTL_POLICY     _IOW('u', 108, struct in6_addrpolicy)
   #define SIOCDADDRCTL_POLICY     _IOW('u', 109, struct in6_addrpolicy)
   
   #define IN6_IFF_ANYCAST         0x01    /* anycast address */
   #define IN6_IFF_TENTATIVE       0x02    /* tentative address */
   #define IN6_IFF_DUPLICATED      0x04    /* DAD detected duplicate */
   #define IN6_IFF_DETACHED        0x08    /* may be detached from the link */
   #define IN6_IFF_DEPRECATED      0x10    /* deprecated address */
   #define IN6_IFF_NODAD           0x20    /* don't perform DAD on this address
                                            * (obsolete)
                                            */
   #define IN6_IFF_AUTOCONF        0x40    /* autoconfigurable address. */
   #define IN6_IFF_TEMPORARY       0x80    /* temporary (anonymous) address. */
   #define IN6_IFF_PREFER_SOURCE   0x0100  /* preferred address for SAS */
   
   /* do not input/output */
   #define IN6_IFF_NOTREADY (IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED)
   
   #ifdef _KERNEL
   #define IN6_ARE_SCOPE_CMP(a,b) ((a)-(b))
   #define IN6_ARE_SCOPE_EQUAL(a,b) ((a)==(b))
   #endif
   
   #ifdef _KERNEL
   VNET_DECLARE(struct in6_ifaddrhead, in6_ifaddrhead);
   VNET_DECLARE(struct in6_ifaddrlisthead *, in6_ifaddrhashtbl);
   VNET_DECLARE(u_long, in6_ifaddrhmask);
   #define V_in6_ifaddrhead                VNET(in6_ifaddrhead)
   #define V_in6_ifaddrhashtbl             VNET(in6_ifaddrhashtbl)
   #define V_in6_ifaddrhmask               VNET(in6_ifaddrhmask)
   
   #define IN6ADDR_NHASH_LOG2              8
   #define IN6ADDR_NHASH                   (1 << IN6ADDR_NHASH_LOG2)
   #define IN6ADDR_HASHVAL(x)              (in6_addrhash(x))
   #define IN6ADDR_HASH(x) \
       (&V_in6_ifaddrhashtbl[IN6ADDR_HASHVAL(x) & V_in6_ifaddrhmask])
   
   static __inline uint32_t
   in6_addrhash(const struct in6_addr *in6)
   {
           uint32_t x;
   
           x = in6->s6_addr32[0] ^ in6->s6_addr32[1] ^ in6->s6_addr32[2] ^
               in6->s6_addr32[3];
           return (fnv_32_buf(&x, sizeof(x), FNV1_32_INIT));
   }
   
   extern struct rmlock in6_ifaddr_lock;
   #define IN6_IFADDR_LOCK_ASSERT()        rm_assert(&in6_ifaddr_lock, RA_LOCKED)
   #define IN6_IFADDR_RLOCK(t)             rm_rlock(&in6_ifaddr_lock, (t))
   #define IN6_IFADDR_RLOCK_ASSERT()       rm_assert(&in6_ifaddr_lock, RA_RLOCKED)
   #define IN6_IFADDR_RUNLOCK(t)           rm_runlock(&in6_ifaddr_lock, (t))
   #define IN6_IFADDR_WLOCK()              rm_wlock(&in6_ifaddr_lock)
   #define IN6_IFADDR_WLOCK_ASSERT()       rm_assert(&in6_ifaddr_lock, RA_WLOCKED)
   #define IN6_IFADDR_WUNLOCK()            rm_wunlock(&in6_ifaddr_lock)
   
   #define in6_ifstat_inc(ifp, tag) \
   do {                                                            \
           if (ifp)                                                \
                   counter_u64_add(((struct in6_ifextra *)         \
                       ((ifp)->if_afdata[AF_INET6]))->in6_ifstat[  \
                       offsetof(struct in6_ifstat, tag) / sizeof(uint64_t)], 1);\
   } while (/*CONSTCOND*/ 0)
   
   extern u_char inet6ctlerrmap[];
   VNET_DECLARE(unsigned long, in6_maxmtu);
   #define V_in6_maxmtu                    VNET(in6_maxmtu)
   #endif /* _KERNEL */
   
   /*
    * IPv6 multicast MLD-layer source entry.
    */
   struct ip6_msource {
           RB_ENTRY(ip6_msource)   im6s_link;      /* RB tree links */
           struct in6_addr         im6s_addr;
           struct im6s_st {
                   uint16_t        ex;             /* # of exclusive members */
                   uint16_t        in;             /* # of inclusive members */
           }                       im6s_st[2];     /* state at t0, t1 */
           uint8_t                 im6s_stp;       /* pending query */
   };
   RB_HEAD(ip6_msource_tree, ip6_msource);
   
   /*
    * IPv6 multicast PCB-layer source entry.
    *
    * NOTE: overlapping use of struct ip6_msource fields at start.
    */
   struct in6_msource {
           RB_ENTRY(ip6_msource)   im6s_link;      /* Common field */
           struct in6_addr         im6s_addr;      /* Common field */
           uint8_t                 im6sl_st[2];    /* state before/at commit */
   };
   
   #ifdef _KERNEL
   /*
    * IPv6 source tree comparison function.
    *
    * An ordered predicate is necessary; bcmp() is not documented to return
    * an indication of order, memcmp() is, and is an ISO C99 requirement.
    */
   static __inline int
   ip6_msource_cmp(const struct ip6_msource *a, const struct ip6_msource *b)
   {
   
           return (memcmp(&a->im6s_addr, &b->im6s_addr, sizeof(struct in6_addr)));
   }
   RB_PROTOTYPE(ip6_msource_tree, ip6_msource, im6s_link, ip6_msource_cmp);
   
   /*
    * IPv6 multicast PCB-layer group filter descriptor.
    */
   struct in6_mfilter {
           struct ip6_msource_tree im6f_sources; /* source list for (S,G) */
           u_long                  im6f_nsrc;    /* # of source entries */
           uint8_t                 im6f_st[2];   /* state before/at commit */
   };
   
   /*
    * Legacy KAME IPv6 multicast membership descriptor.
    */
   struct in6_multi_mship {
           struct  in6_multi *i6mm_maddr;
           LIST_ENTRY(in6_multi_mship) i6mm_chain;
   };
   
   /*
    * IPv6 group descriptor.
    *
    * For every entry on an ifnet's if_multiaddrs list which represents
    * an IP multicast group, there is one of these structures.
    *
    * If any source filters are present, then a node will exist in the RB-tree
    * to permit fast lookup by source whenever an operation takes place.
    * This permits pre-order traversal when we issue reports.
    * Source filter trees are kept separately from the socket layer to
    * greatly simplify locking.
    *
    * When MLDv2 is active, in6m_timer is the response to group query timer.
    * The state-change timer in6m_sctimer is separate; whenever state changes
    * for the group the state change record is generated and transmitted,
    * and kept if retransmissions are necessary.
    *
    * FUTURE: in6m_link is now only used when groups are being purged
    * on a detaching ifnet. It could be demoted to a SLIST_ENTRY, but
    * because it is at the very start of the struct, we can't do this
    * w/o breaking the ABI for ifmcstat.
    */
   struct in6_multi {
           struct  in6_addr in6m_addr;     /* IPv6 multicast address */
           struct  ifnet *in6m_ifp;        /* back pointer to ifnet */
           struct  ifmultiaddr *in6m_ifma; /* back pointer to ifmultiaddr */
           u_int   in6m_refcount;          /* reference count */
           u_int   in6m_state;             /* state of the membership */
           u_int   in6m_timer;             /* MLD6 listener report timer */
   
           /* New fields for MLDv2 follow. */
           struct mld_ifsoftc      *in6m_mli;      /* MLD info */
           SLIST_ENTRY(in6_multi)   in6m_nrele;    /* to-be-released by MLD */
           struct ip6_msource_tree  in6m_srcs;     /* tree of sources */
           u_long                   in6m_nsrc;     /* # of tree entries */
   
           struct mbufq             in6m_scq;      /* queue of pending
                                                    * state-change packets */
           struct timeval           in6m_lastgsrtv;        /* last G-S-R query */
           uint16_t                 in6m_sctimer;  /* state-change timer */
           uint16_t                 in6m_scrv;     /* state-change rexmit count */
   
           /*
            * SSM state counters which track state at T0 (the time the last
            * state-change report's RV timer went to zero) and T1
            * (time of pending report, i.e. now).
            * Used for computing MLDv2 state-change reports. Several refcounts
            * are maintained here to optimize for common use-cases.
            */
           struct in6m_st {
                   uint16_t        iss_fmode;      /* MLD filter mode */
                   uint16_t        iss_asm;        /* # of ASM listeners */
                   uint16_t        iss_ex;         /* # of exclusive members */
                   uint16_t        iss_in;         /* # of inclusive members */
                   uint16_t        iss_rec;        /* # of recorded sources */
           }                       in6m_st[2];     /* state at t0, t1 */
   };
   
   void in6m_disconnect(struct in6_multi *inm);
   extern int ifma6_restart;
   /*
    * Helper function to derive the filter mode on a source entry
    * from its internal counters. Predicates are:
    *  A source is only excluded if all listeners exclude it.
    *  A source is only included if no listeners exclude it,
    *  and at least one listener includes it.
    * May be used by ifmcstat(8).
    */
   static __inline uint8_t
   im6s_get_mode(const struct in6_multi *inm, const struct ip6_msource *ims,
       uint8_t t)
   {
   
           t = !!t;
           if (inm->in6m_st[t].iss_ex > 0 &&
               inm->in6m_st[t].iss_ex == ims->im6s_st[t].ex)
                   return (MCAST_EXCLUDE);
           else if (ims->im6s_st[t].in > 0 && ims->im6s_st[t].ex == 0)
                   return (MCAST_INCLUDE);
           return (MCAST_UNDEFINED);
   }
   
   /*
    * Lock macros for IPv6 layer multicast address lists.  IPv6 lock goes
    * before link layer multicast locks in the lock order.  In most cases,
    * consumers of IN_*_MULTI() macros should acquire the locks before
    * calling them; users of the in_{add,del}multi() functions should not.
    */
   extern struct mtx in6_multi_list_mtx;
   extern struct sx in6_multi_sx;
   
   #define IN6_MULTI_LIST_LOCK()           mtx_lock(&in6_multi_list_mtx)
   #define IN6_MULTI_LIST_UNLOCK() mtx_unlock(&in6_multi_list_mtx)
   #define IN6_MULTI_LIST_LOCK_ASSERT()    mtx_assert(&in6_multi_list_mtx, MA_OWNED)
   #define IN6_MULTI_LIST_UNLOCK_ASSERT() mtx_assert(&in6_multi_list_mtx, MA_NOTOWNED)
   
   #define IN6_MULTI_LOCK()                sx_xlock(&in6_multi_sx)
   #define IN6_MULTI_UNLOCK()      sx_xunlock(&in6_multi_sx)
   #define IN6_MULTI_LOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XLOCKED)
   #define IN6_MULTI_UNLOCK_ASSERT() sx_assert(&in6_multi_sx, SA_XUNLOCKED)
   
   
   /*
    * Look up an in6_multi record for an IPv6 multicast address
    * on the interface ifp.
    * If no record found, return NULL.
    *
    * SMPng: The IN6_MULTI_LOCK and IF_ADDR_LOCK on ifp must be held.
    */
   static __inline struct in6_multi *
   in6m_lookup_locked(struct ifnet *ifp, const struct in6_addr *mcaddr)
   {
           struct ifmultiaddr *ifma;
           struct in6_multi *inm;
   
           inm = NULL;
           CK_STAILQ_FOREACH(ifma, &((ifp)->if_multiaddrs), ifma_link) {
                   if (ifma->ifma_addr->sa_family == AF_INET6) {
                           inm = (struct in6_multi *)ifma->ifma_protospec;
                           if (inm == NULL)
                                   continue;
                           if (IN6_ARE_ADDR_EQUAL(&inm->in6m_addr, mcaddr))
                                   break;
                           inm = NULL;
                   }
           }
           return (inm);
   }
   
   /*
    * Wrapper for in6m_lookup_locked().
    *
    * SMPng: Assumes that neithr the IN6_MULTI_LOCK() or IF_ADDR_LOCK() are held.
    */
   static __inline struct in6_multi *
   in6m_lookup(struct ifnet *ifp, const struct in6_addr *mcaddr)
   {
           struct in6_multi *inm;
   
           IN6_MULTI_LIST_LOCK();
           IF_ADDR_RLOCK(ifp);
           inm = in6m_lookup_locked(ifp, mcaddr);
           IF_ADDR_RUNLOCK(ifp);
           IN6_MULTI_LIST_UNLOCK();
   
           return (inm);
   }
   
   /* Acquire an in6_multi record. */
   static __inline void
   in6m_acquire_locked(struct in6_multi *inm)
   {
   
           IN6_MULTI_LIST_LOCK_ASSERT();
           ++inm->in6m_refcount;
   }
   
   static __inline void
   in6m_acquire(struct in6_multi *inm)
   {
           IN6_MULTI_LIST_LOCK();
           in6m_acquire_locked(inm);
           IN6_MULTI_LIST_UNLOCK();
   }
   
   static __inline void
   in6m_rele_locked(struct in6_multi_head *inmh, struct in6_multi *inm)
   {
           KASSERT(inm->in6m_refcount > 0, ("refcount == %d inm: %p", inm->in6m_refcount, inm));
           IN6_MULTI_LIST_LOCK_ASSERT();
   
           if (--inm->in6m_refcount == 0) {
                   MPASS(inm->in6m_ifp == NULL);
                   inm->in6m_ifma->ifma_protospec = NULL;
                   MPASS(inm->in6m_ifma->ifma_llifma == NULL);
                   SLIST_INSERT_HEAD(inmh, inm, in6m_nrele);
           }
   }
   
   struct ip6_moptions;
   struct sockopt;
   struct inpcbinfo;
   
   /* Multicast KPIs. */
   int     im6o_mc_filter(const struct ip6_moptions *, const struct ifnet *,
               const struct sockaddr *, const struct sockaddr *);
   int in6_joingroup(struct ifnet *, const struct in6_addr *,
               struct in6_mfilter *, struct in6_multi **, int);
   int     in6_joingroup_locked(struct ifnet *, const struct in6_addr *,
               struct in6_mfilter *, struct in6_multi **, int);
   int     in6_leavegroup(struct in6_multi *, struct in6_mfilter *);
   int     in6_leavegroup_locked(struct in6_multi *, struct in6_mfilter *);
   void    in6m_clear_recorded(struct in6_multi *);
   void    in6m_commit(struct in6_multi *);
   void    in6m_print(const struct in6_multi *);
   int     in6m_record_source(struct in6_multi *, const struct in6_addr *);
   void    in6m_release_deferred(struct in6_multi *);
   void    in6m_release_list_deferred(struct in6_multi_head *);
   void    ip6_freemoptions(struct ip6_moptions *);
   int     ip6_getmoptions(struct inpcb *, struct sockopt *);
   int     ip6_setmoptions(struct inpcb *, struct sockopt *);
   
   /* flags to in6_update_ifa */
   #define IN6_IFAUPDATE_DADDELAY  0x1 /* first time to configure an address */
   
   int     in6_mask2len(struct in6_addr *, u_char *);
   int     in6_control(struct socket *, u_long, caddr_t, struct ifnet *,
           struct thread *);
   int     in6_update_ifa(struct ifnet *, struct in6_aliasreq *,
           struct in6_ifaddr *, int);
   void    in6_prepare_ifra(struct in6_aliasreq *, const struct in6_addr *,
           const struct in6_addr *);
   void    in6_purgeaddr(struct ifaddr *);
   int     in6if_do_dad(struct ifnet *);
   void    in6_savemkludge(struct in6_ifaddr *);
   void    *in6_domifattach(struct ifnet *);
   void    in6_domifdetach(struct ifnet *, void *);
   int     in6_domifmtu(struct ifnet *);
   void    in6_setmaxmtu(void);
   int     in6_if2idlen(struct ifnet *);
   struct in6_ifaddr *in6ifa_ifpforlinklocal(struct ifnet *, int);
   struct in6_ifaddr *in6ifa_ifpwithaddr(struct ifnet *, const struct in6_addr *);
   struct in6_ifaddr *in6ifa_ifwithaddr(const struct in6_addr *, uint32_t);
   struct in6_ifaddr *in6ifa_llaonifp(struct ifnet *);
   int     in6_addr2zoneid(struct ifnet *, struct in6_addr *, u_int32_t *);
   int     in6_matchlen(struct in6_addr *, struct in6_addr *);
   int     in6_are_prefix_equal(struct in6_addr *, struct in6_addr *, int);
   void    in6_prefixlen2mask(struct in6_addr *, int);
   int     in6_prefix_ioctl(struct socket *, u_long, caddr_t,
           struct ifnet *);
   int     in6_prefix_add_ifid(int, struct in6_ifaddr *);
   void    in6_prefix_remove_ifid(int, struct in6_ifaddr *);
   void    in6_purgeprefix(struct ifnet *);
   
   int     in6_is_addr_deprecated(struct sockaddr_in6 *);
   int     in6_src_ioctl(u_long, caddr_t);
   
   void    in6_newaddrmsg(struct in6_ifaddr *, int);
   /*
    * Extended API for IPv6 FIB support.
    */
   struct mbuf *ip6_tryforward(struct mbuf *);
   void    in6_rtredirect(struct sockaddr *, struct sockaddr *, struct sockaddr *,
               int, struct sockaddr *, u_int);
   int     in6_rtrequest(int, struct sockaddr *, struct sockaddr *,
               struct sockaddr *, int, struct rtentry **, u_int);
   void    in6_rtalloc(struct route_in6 *, u_int);
   void    in6_rtalloc_ign(struct route_in6 *, u_long, u_int);
   struct rtentry *in6_rtalloc1(struct sockaddr *, int, u_long, u_int);
   #endif /* _KERNEL */
   
   #endif /* _NETINET6_IN6_VAR_H_ */

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